Furnace structure



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E. M. KANE FURNACE STRUCTURE Filed Aug. 22, 1941 Sept. 12, 1944.

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E. M. KANE 2,357,832

FURNACE STRUCTURE Filed Aug 22, 1941 2 Sheets-Sheet 2 Patented Sept. 12, 1944 UNITED STATES PATENT OFFICE FURNACE STRUCTURE Edward M. Kane, Ithaca, N. Y.

Application August 22, 1941, Serial No. 407,963

2- Claims.

and volatile gases during firing operation.

A further object of the invention is to provide a furnace structure with sinuous air passageways in the opposed side walls of the furnace fire box so that jets of air may be projected above the fire to complete combustion during the firing operation and to close a portion of the passage-ways during the normal operation of the furnace.

A still further object of the invention is to provide a furnace fire box structure with sinuous passages in the side walls thereof for preheating air so that the air when projected over the fire box will more readily complete combustion of the volatile gases during firing operation and to provide automatic means for closing off or reducing the admission of air to the fire box upon the lapse of a predetermined time'interval.

Other objects and advantages of the invention will become apparent during the course of the following description of the accompanying drawings, wherein,

Figure 1 is a side elevational view of a furnace structure embodying the invention and illustrating the furnace broken away through the fire box area to illustrate in detail the arrangement of the air feeding compartment;

Figure 2 is a front elevational View of a furnace structure showing portions broken away to further illustrate in detail the location of the air jet compartments and the general arrangement of the air feeding ducts; and

Figure 3 is a vertical cross-sectional view taken on line 33 of Figure 1, looking in the direction of the arrows, illustrating in detail the construction of one of the air feeding chambers.

In the drawings, wherein for the purpose of illustrating the invention and wherein like reference characters will be employed to designate like parts throughout the same, the reference character 5 will generally be employed to desigmate a furnace structure having a pair of brick opposed side walls 6, an end wall I and a front wall 8.

A boiler 9 is supported by the rear brick wall 1, while the opposite. end is supported on a ledge l0 carried by the front wall 8. The forward portion of the furnace structure is prop 8, 'l and I1.

vided with a fire box chamber ll confined between the side and front walls and a bridge fire box wall l2.

The furnace gases pass rearwardly of the furnace structure over the fire box bridge wall [2 and return through the boiler flue pipes in the boiler 9 and are carried off by means of a stack, as at I3.

Fire doors M are provided in the front wall 8 beneath which is located ash doors. I5 and access may be had to the boiler flues for the purpose of cleaning the same through doors [6 carried by the front wall of the furnace 8,' above A top wall I! completes the furnace structure and a refractory lining I8 is placed on the side walls 6, as well as the front, rear and top walls The refractory lining may be of usual construction and is intended to withstand high temperatures. A boiler feed pipe 19 is pro vided for supplying the boiler 9 and a clean-out discharge door 20 is provided in the rear wall 1 for removing foreign matter deposited on the floor of the furnace from the boiler tubes.

The invention comprises a pair of oppositely disposed air feeding chambers 2| which are located on opposite sides of the fire box H and ar mounted in the refractory side wall linings I 8. Each air feeding chamber 2| is rectangularly formed and extends longitudinally of the furnace structure between the front wall 8 and the fire box bridge arch l2 immediately above the grate bars 22. 7

Each air feeding chamber 2| is provided with side walls 23 connected at the upper end by a top wall 24 and at the lower end by means of a bottom wall 25. End walls 26 complete the structure.

One of the side walls 23 is presented to the fire box I l and the other wall is embedded in the refractory side wall lining l8, as shown in Figure 3. The walls 23 which are presented to the fire box are provided with perforations 28 and 29 arranged in parallel rows, extending throughout the entire length of the air feeding chamber 2|.

Connecting the side walls 23 of the rectangular box-like structure, is a partition 30 which extends from one of the end walls 26 and terminates short of the opposite, end wall to provide a passageway 3| extending the entire length of the air feeding chamber where it communicates with a vertical passageway 32 formed by means of a vertically positioned partition wall 33 connecting the side walls 23 and terminating 7 end of each air feeding chamber 2| of a T-union 4|.

Extending longitudinally of the air chamber 2| is a partition 36 which connects the side walls 23 and is located between the partitions and 34 so that one end will connected with the vertical partition 33 while the opposite end will terminate a distance short of the end wall 26. The partition 36 divides the parallel rows of apertures 28 and 29 so that a compartment or air passageway 31 and 38 will be provided for each row of apertures.

Pipe sections 38 are connected to the forward and one of the pipe sections 38 is provided with an elbow 39 for connection with a pipe line 40 which connects with th other pipe section 38 as by means A pipe 42 is connected to a pipe 43 by means of an elbow 44 and the pipe 43 is connected to the exhaust'45 of an air blower 46, whereby a constant air feed will be supplied end walls 26 and contact the central partition plate 36 to cut off the lower passageway 38, during normal operation of the furnace. The gate 48 slides in a longitudinal slot in the end wall 26, and communicates with a similarly shaped slot in a reduced portion of the front wall 8 by means of the cavity 41. A slide rod 49 has one end connected to the sliding gate 48 and the opposite end attached to a bell crank 50 pivotally attached to a suitable bracket 5! secured to the front wa1l 8.

A time controlled latch release member 52 is mounted on the front wall 8 adjacent the top of the furnace and is provided with a control lever 53 which is adapted to be tripped to so that the lever 53 will raise the slide rod 54 which connects the lever 53 and one arm of the bell crank lever 58. A weighted member 55 may be slidably attached to the bell crank lever 5|] so that the bell crank lever will rotate when the latch 53 is released to move the gate 48 to its closed position.

During normal operation of the air feeding system, the air will pass from the blower 46 to each of the air feeding chambers 2| and will pass the length of the chamber through the passageway 3| whereby the air will return and pass in the opposite direction through the passage to the front wall 26 and into the passageway 31 so that the air will pass over the fire box H throughthe apertures 28 and support combustion of the unburned gases before the same pass to the boiler.

During firing operation, and when coal is fed to the fire box, a great volume of volatile gases are created and during this period, it is intended to open the gate 48 manually by lifting upwardto a great degree, with the result that the boiler.

fines will be kept in a clean condition, thereby increasing the efiicien-cy of the furnace and the burned gases will create additional heat, thereby increasing the efficiency of the furnace opera tion.

It is to be understood that the form of the invention herewith shown and described is to be taken as the preferred embodiment of the same and that various changes in the shape, size and arrangement of parts maybe resorted to without departing from the spirit and scope of the invention as claimed.

Iclaim: I l. A furnace structure having a fire box, an elongated air chamber at each side of the fire box, each chamber comprising a closed casing having one side exposed to the fire box, a series of vertically spaced horizontal partition walls in the casing terminating in spaced relation to the rear end of the casing and connected by a vertical wall forming a circuitous passageway in the casing around the horizontal partitions, an air inlet to the lower side of the passageway adjacent the front of the casing, the lower one of said.

partitions extending to the front end of the casing and the superposed partitions terminating in spaced relation to said front end of the casing for the entry of air to the spaces between the partitions, and the side of the casing exposed to the fire box having alined rows of openings therein registering with the spaces between the partitions whereby heated air is delivered from the casing into the fire box to promote combustion ly on one arm of the bell crank '50' so that an,

and consume smoke.

2. A furnace structure having a fire box, an elongated air chamber at each side of the fire box, each chamber comprising a closed casing having one side exposed to the firebox, a series of vertically spaced horizontal partition walls in the casing terminating in spaced relation to the rear end of the casing and connected by'a vertical wall forming a circuitous passageway in the casing around the horizontal partitions, an air inlet to the lower side of the passageway adjacent the front of the casing, thelowerone of said partitions extending to the front end of the casing and the superposed partitions terminating in spaced relation to said front end of the casing for the entry of air to the spaces between the V partitions, and the side of the casing exposed to the fire box having alined rows of openings 

